Sure 0.1% over the entire arctic is huge amount of energy compared to our electricity usage but not compared to whole icepack.
In April the ice volume is around 23,000 km3
In September it is around 5,000km3
Energy required to melt 1000km3 of ice:
306,866,000,000,000,000 KJ
Additional Energy per day from 0.1% if the whole icepack had meltponds with 0.5 albedo:
115,400,000,000,000 KJ
So it would take 2659 days of peak summer to melt one additional 1000km3.
In my forecast model I already reduce absorbed energy by 20% because there isn't always clear sky and not all low sea ice concentration directly affects ice melt.